The thespians at Littleton's Cannon Theatre promise non-stop laughs, and then some, in their production of the Roman romp A Funny Thing Happened on the Way to the Forum.

They'll bring down the house and tickle your funny bone, May 16 through June 7 at their playhouse, located in the old mill building at 410 Great Road, near Littleton Common.

With a book by Burt Shrevelove and Larry Gelbart, music by Stephen Sondheim and direction by Shawn Cannon, Forum is a non-stop laugh fest as it tells the story of a crafty slave named Pseudolus who is trying to win his freedom and the hand of the beautiful, but slow-witted courtesan Phila for his young master Hero.

With its classic opening tune "Comedy Tonight," Forum promises "something for everyone" and gives its cast of comic actors many chances to shine.

Show dates are May 16, 17, 23, 24, 30, 31, June 5, 6 and 7 at 7:30 p.m., with a matinee on May 31 at 1 p.m. The first weekend, May 16-17, tickets are $16, adults; $12, seniors/students; $8, children 10 and under. For the following performances, tickets are $20, adults; $15, seniors/students and $10, children 10 and under. Purchase online at MKTIX or mail check with ticket from thecannontheatre.org to 410 Great Road, Littleton or call 978-456-0060.

On the marquee

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SEASON FINALE: In its final concert of the current season on Monday, May 19, the Nashoba Youth Orchestra will perform works by Bach, Grieg and Vivaldi, among others. The concert, being performed at 7 p.m. in the Littleton High School Performing Arts Center, 56 King St., Littleton, will be the 10-year-old orchestra's final concert under the umbrella of the Westford-based Parish Center for the Arts. Future NYO performances, beginning with the 2014-2015 season, will be performed under Indian Hill Music and the orchestra gets a new name -- Nashoba Youth Orchestra@Indian Hill Music (NYO@IHM). To celebrate, the staff of Indian Hill Music will host a reception immediately after the concert. Auditions will be held on May 27-28 for membership in the NYO@IHM. String players through age 18 are invited to sign up for an audition. Visit http://nashobayouthorchestra.org to enroll.

TRIO OF CLASSICS: Reagle Music Theatre of Greater Boston brings three classic musicals to its Waltham stage in its 46th summer season. On tap are Rodgers and Hammerstein's South Pacific, featuring Broadway's Lydia Gaston as Bloody Mary, June 12-22.

Also on stage is Me and My Girl, the Cockney love story that earned Tewksbury's Maryann Plunkett the 1987 Tony Award for Best Leading Actress in a Musical, July 10-20, and the feel-good, rain-soaked musical Singin' In the Rain, Aug. 7-17. Individual tickets range from $35-$63 and season subscriptions and group tickets are available. Visit reaglemusictheatre.com, call 781-891-5600 or visit the box office at 617 Lexington St., Waltham.

SUMMER AT NSMT: Beverly's North Shore Music Theatre kicks off its 2014 season with Anything Goes, starring Eddie Mekka of Laverne and Shirley fame, June 3-15. Other shows in the line-up include Disney's The Little Mermaid, July 8-27; Grease, Aug. 12-24: Chicago, Sept. 23-Oct. 5; Les Miserables, Oct. 28-Nov. 9, and A Christmas Carol, Dec. 5-21. Visit nsmt.org for other events and subscription and ticket information.